/**
 * COOKIE存储
 * @param {String} key键
 * @param {Object} val值
 * @param {Number} time 时间，默认10s
 */
function setcookie(key,val,time = 10)
{
    if (typeof val =='object') val=JSON.stringify(val)
    const d=new Date
    d.setTime(d.getTime()-1000*60*60*8+1000*time)
    document.cookie=`${key}=${val}; expires=${d}`
}


/**
 * COOKIE获取
 * @param {String} key 键
 * @returns String
 */
function getcookie(key)
{
    let arr=document.cookie.split('; ')
    for (let i=0;i<arr.length;i++){
        let item=arr[i]
        let tempArr=item.split('=')
        if(tempArr[0]==key)return tempArr[1]
    }
}


/**
 * COOKIE删除
 * @param {String} key 键
 * @returns undefined
 */
function removecookie(key)
{
    setcookie(key,null,-1)
}